computeZscores {OUTRIDER} | R Documentation

## Z score computation

### Description

Computes the z scores for every count in the matrix. The z score is defined in the log2 space as follows: zij = (lij - mujl)/ sigmajl, where l is the log2 transformed normalized count and mu and sigma the mean and standard deviation for gene j, respectively.

### Usage

    computeZscores(ods, ...)

    ## S4 method for signature 'OutriderDataSet'
    computeZscores(ods, peerResiduals = FALSE, ...)

### Arguments

`ods` | OutriderDataSet
`...` | Further arguments passed on to `ZscoreMatrix`.
`peerResiduals` | If TRUE, PEER residuals are used to compute Z scores

### Value

An OutriderDataSet containing the Z score matrix "zScore" and the log2 fold changes "l2fc" as asasys.

### Examples

    ods <- makeExampleOutriderDataSet()
    ods <- estimateSizeFactors(ods)

    ods <- controlForConfounders(ods, implementation="pca")
    ods <- computeZscores(ods)

    zScore(ods)[1:10,1:10]
    assay(ods, "l2fc")[1:10,1:10]

[Package OUTRIDER version 1.6.0 Index]